Hi Steve, I own a TS 2810 which is a direct crossover to the Bolens G292 and maybe a direct crossover to the White 2-30. The White parts are available but the Bolens parts are hit and miss with their new owners(I believe that to be MTD). Getting parts from importers is also an option, a bit pricey though. The TS were made around the late 70's into the early 80's. The TL were next and then the TU series. I am not sure who owns whom but Iseki and Isuzu are related. White made a Field Boss 21 from 1986 to 1988. it has 19 HP at the PTO and the engine was made by Iseki, which I believe to be a TL 1900. White also made a FB-31 which is a close match to a TL 2500.
The TS series that I have match to bolens are the G292, G272, G242, and G192 (Note, the first two numbers are HP the last number is wheel drive, so you may see a Bolens G194 which make it a 19 HP and 4wd).
Got to go, hot UNO game waiting with son number three.
CKS