http://www.blakes-lavac-taylors.co.uk/blakes_baby.htm ...about $6250 from this UK dealer at today's rate of exchange. However, that price does include 17.50% VAT, which you wouldn't have to pay and also include shipping. http://www.mailspeedmarine.com/toilet-systems/blakes-lavac-taylors/baby-blake-deluxe-toilet948403.bhtml

The closest clone made the US any more is the Groco model K...which is around $800. It's a good toiletm but has an unfortunate tendency to recirculate when non-replaceable parts in the pump become worn after 10-15 years.

Or, you could pull in your horns a bit and give the Raritan PH II a try. It's plastic, but has a typical lifespan of 20+ years...and is a available as a "conversion" (base and pump only..you can recycle your existing bowl, seat and lid) from the sbo.com chandlery (online store here) for under $300 http://shop.sailboatowners.com/detail.htm?group=1357&cat=1002

Unless you want to change to the Lavac system, there really aren't any other good choices in manual toilets any more