Dick over at BigLube dot com has the stainless-steel 'Tower Of Power' I have one, with the brass adapters to do my 31, 36 and 44's. I even got an adapter to cope with the massive Colt Walker cylinder (ask it don't come as standard)
They are totally over-engineered marvels, great welding, great bearings. I cannot recommend them enough. They are works of art.
About £150 if I remember totals, when posted by airmail and VAT paid. Plus our wonderful private Royal Mails £8 'Handling Fee'.
Other will suggest others, maybe far cheaper. But I do have a ToP and can speak to the quality.