So this is the link to it - EFI Controllers - Electronic Jet Kit - Motorcycles, ATVs, UTVs, Sportbikes, Snowmobiles, Watercraft, Dirt Bikes
It's US based, but various places across Europe etc sell it - I bought from a Dutch company and after conversion was around £180 (roughly) + any potential import costs.
So, some may have read in the booster plug thread, I was having trouble with the TDM running very lean after putting a pair of Black Widows on.
I have an AFR gauge so can monitor the ratio in real time which really helps sort out issues, but essentially the booster plug made very little difference and I wouldn't really recommend unless if you only need a tiny tweak in fueling (not worth the cost IMO but others have had good success).
I really wanted a power commander, but buying then new is pretty expensive and second hand is very hard to find now that these bikes are getting older, but spotted this EJK which seems to do a similar thing.
So this connects into the injector connector (the left hand side one) and detects the injector pulse from the ECU, then either extends or shortens the pulse according to the pre-set values. This is pretty much the same thing the PC does.
So the main difference with the PC is the way you 'programme' the fueling. This has everything built into the box and is controlled by a menu and then a + or - button.
It's called a 'jet kit' as it changes the same area's that carbs would - initial idling and low throttle cruising on idle jets, needle heights for acceleration, and main jets for WOT (sort of).
You use the menu button to scroll through the parameters and then + or - to control the level of change. You can change the fueling at each area, and also the rev range that each area of effect covers.
For such a basic controller, it's actually not bad once you get the hang.
So does it work - yes, and I'm really pleased with the results.
Without the controller on it was idling ok at around 13 but jumping over 16 at 3000rpm and only coming back down above 5000. With this module it's idling around 12, and doesn't go above 13 when revved through the range 
I also tweaked the idle setting and the rev's were audibly changing and I could see the AFR changing, so it's definitely changing the fueling on the fly as it states it does.
I haven't ridden it yet as I need to finish a few things and get it MOTed, but these figures are looking very promising and inspires a bit more confidence that my valves aren't getting fried with lean running. I'm hoping it'll also smooth out the ride as those leaner levels (must have been on the lean side even with OEM cans) wouldn't give a great ride.
So outside of remapping, if you wanted a comprehensive, detailed fuel mapping software where you can tweak in detail with help of a dyno etc, then a power commander would be the way to go, but for a fairly easy, less detailed fueling change I really think this is not a bad option. It obviously helps to have the AFR gauge to see what the ratio's are, but it comes setup out of the box for a general tune of TDM with aftermarket exhausts and airbox update, so most likely would be fine to just install and forget about it.
I'll update once I get the chance to ride it and see how it's affected the characteristics.
