I'm too big for this country, apparently

Try as I might, I can't find a jacket large enough for me.

I need a size 48 (122cm) Long (as in, long sleeves).

My goddam gorilla-esque arms are too long to fit into a size 48 Regular, which is apparently the largest size that anyone stocks.

Even Edgars' "Size Up" range doesn't cater for my needs. I'm at a loss.

*shrug*