120, 210, 300. That Trioplan will be strained to cover 4x5, I believe it was meant for 9x12cm. For 120 you can find an Angulon pretty reasonably, 210 Plasmats are cheap, 300mm Plasmats might strain your camera fatally so look for a slower process type lens or one of the f:6.3 Tessar types. A 300mm Dagor is a nice small lens. So is a 210 Dagor, and an Angulon is a "reverse" Dagor - if you're patient you can find uncoated Dagors at very good prices.
When looking for lenses at a good price, chance favors the prepared mind - so educate yourself as to lens types, their coverage, and the various names they are sold under