Well... if you really must have a card without any heatsink, then I can name a couple... but they won't be anything better then Voodoo3/TNT2/MX200 level performance, and you won't even really see any benefit to using an Orb on cards like those.
You really are better off just taking off the stock HSF, and if you are not willing to take it off... then IMHO just but a better card with a HSF and forget about using the Orb at all.
Because the cards that have no HeatSink or fan arent going to perform at all well compared to even a regular GF2 MX400 or so.