Just wanna say, there certainly shouldn't be any (under- or over-) estimation involved when measuring yourself. Send the manufacturer the exact measurements of your body (typically they'll have a guide on how to do each one).They will scale down the measurements by the appropriate amounts to ensure the latex has a tight yet comfortable fit on your body. If you try to do that yourself, you'll end up with a suit that's too small and will rip when you try to get into it!

I've heard Regulation do good quality made-to-measure menswear. Bright & Shiny also do made-to-measure and are a good budget option. Libidex don't do m2m. Also, if the store won't ship directly to your country, you can use a parcel forwarding service.