I actually bought a new motor and base for mine. The pair is pretty affordable sometimes from CPO (~$100).
However, you can do just the base, and swap it out easier!: The base is here: https://www.amazon.com/Bosch-RA1165-Under-Table-Router-Above-Table/dp/B0007VHPFK/ref=pd_bxgy_469_2?_encoding=UTF8&psc=1&refRID=0S7RNVNBGCZTFHKAA550
Bosch Under-Table Router Base is the table mount. The package came with the router, this base, the plunger base, and a case. $170 total. It was a split package though, not everything in one box.
You don't need a lift for Bosch, just a $60 base: https://www.amazon.com/dp/B0007VHPFK
The bosch 1617 is a top notch handheld router, best on the market.
The benchtop router table is a bit of a different story. Too small for my taste and their small size makes them rattle and vibrate excessively unless you bolt it down tight, even then not ideal. Some people with small shops like that they can stow them away when not in use though I guess. Anyway, you can steal the table surface off it and attach it to your table saw or build a bigger cabinet for it if you already have it though. The bosch system uses a router lift base adapter that is OK, not as good as a proper lift but it gets the job done, mostly, and is a lot cheaper.
I find it really annoying to have to swap my router in and out of the table, switch bases around and what not, so I have a dedicated router in a lift and then a separate handheld router (well several actually). But if you are on a budget and don't mind living with the hassle the 1617 is more than adequate for table operation.
If you have a Bosch, they sell an under-table base that adjusts via an allen key - https://www.amazon.com/Bosch-RA1165-Under-Table-Router-Above-Table/dp/B0007VHPFK/ref=sr_1_2
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They sell a table-specific base - https://www.amazon.com/Bosch-RA1165-Under-Table-Router-Above-Table/dp/B0007VHPFK