Is there really no way to fit XT (M-780-B) iSpec shifters to the bars without bolting them to iSpec brake levers? I researched last night until my head was spinning and couldn't find anything.
These buggers

I should say (again! because my Privacy thankfully was valued last time I wasted time typing it) that I found Matchmaker things to mount them to SRAM/Hope and iSpec converters, but I need bar clamps...
A quick look on CRC shows that there's bar mount and i-spec B mount versions so I suspect not.
Need something like this if I've understood the question (i.e. you have the shifters but want to clamp them directly to the bar)
https://clee-cycles.co.uk/P51583/product
Yes indeed, something like that. (For iSpec-B)
Would've been so simple for Shimano to make a clamp that bolted to the big bolt in the middle of the shifter, wouldn't it?
Seems they did with XTR

DezB - I have just converted a pair of XT M780 shifters from bar mount to iSpec B.
I'm selling the original fittings if you are interested.
Drop me a PM and I can send you a couple of photos.