Brompton owners

Another one - It looks like it might be more cost-effective to just buy a new rear wheel, as the current rim looks to be near the end of it's life and spokes starting to show signs of rust. I measured my rear-dropouts at 130mm, but a lot of the 20" wheels for sale on eBay are designed for 135mm spacing. Is 135mm the standard for folders?

Edit - Didn't realise Brompton had their own spacing and use 16" wheels, so apologies this is off-topic!

Yep, 16" rims (ERD349) and 76mm front and 110mm rear OLDs.