Antique white shower base?

We're renovating an 1880's place and have a claw foot bath in the bathroom. It's not an old one but I like it and would like to match a vanity and shower base to the same colour. The problem is it's antique white so not ivory (too "apricoty") and not white like all the bathroom accessories seem to be. I live in Albury and have exhausted all the options of suppliers here. Any ideas of other suppliers? We'll need a semi recessed basin due to size and a 900x1200 shower base. Prefer not to tile the shower base. Thanks for your ideas!

Any idea who the maker of the tub is/was? there may be a brand under it - if so, contact them. Alternatively get a range of colour chips from a paint store and match the colour to the chip - then send them to several firms in the big smoke ..... Are you looking for items that create a period feel or modern items the same colour?