Hi Ailsa,
Have you tried Danny's shop on Candlemaker row in Edinburgh? I think it's called Electric Cabaret or something.
I can recommend various latex labels and would advise you contact them directly to discuss fittings etc. As i have had quite the colourful career in fetish modelling i can seriously recommend the following brands:
Jane Doe Latex - for funky costume latex
No Pain No Gain - for catwalk style fashions but in latex!
Westward Bound - for classic designs and a long expertise
Marquis - for a good selection and expertise
TG Clothing - for ultra modern, fun and very fet-trendy.
TG do a nice cabaret outfit too.
Fraulein Ehrhardt does the most exquisite pieces:
You are seriously advised to contact the designers whos styles you fancy and ask questions about your body shape, size and colouring to get the best options. ALso, when it comes to latex - invest. The cheap stuff you get in most shops is awful on your skin and less than sexy if you feel it!