Yes, once you get in the £150 pricerange.

A 50 or 63mm bore ram would accept a mod 2 round rack a 80mm bore ram would use a mod 2.5 round rack.

So, including machinist work to fit the piston to the rack, I think youre paying £250 for just the ram.
Then you need the -rather cheap- pinion, and the mounting to get everything together.