Unless you luck out and find someone selling a set of domes from a 55g Realforce, you're probably going to have to go with something from BKE. It's not all that hard to swap out the domes, just time consuming. Topre keyboards generally have two large sheets that cover most of the alpha keys, and then a bunch of singles and strips of 3 and 4 domes that cover the rest of the keyboard. BKE's V2 domes come in sheets just like the originals, which makes it quite a bit faster to swap them over, and reduces the chances of getting a dome or two misaligned.