Short and sweet:
I'm looking for a vendor to supply an offset, 29-30mm internal, T800 rim.
TLDR:
I've emailed Farsports a couple of times. I got the usual short non-confidence inspiring replies. I asked specifically if a particular model of rim was made of T800 and the response was "Yes, we made the rims with special material T800 to be Ultralite." Honestly I don't trust that to be the case so I'm reluctant to buy anything from them ...my spreadsheet says they don't have a non-T800 rim to fit my needs anyway.
I've pored over the 29" MTB rims on Carbonspeed's clunky site and couldn't find anything either.
In your guys' experience if a product is made from T800 do you expect it to be labeled specifically as such? As a retailer or manufacturer I would make it obvious to my customers. The material is more expensive but has advantages so it would be in the best interest of the seller to let folks know what they're buying in my opinion.