Rough Trade affiliate link

TL;DR: how can I support the site and make sure you get credit for an album purchase in the US?

The Rough Trade affiliate link is always for Great Britain. When you switch to US dollars, the site changes to the US site. That presents two issues:

  1. The album is often unavailable in the US.
  2. If it is available in the US, the URL loses the arguments that seem to be related to making sure the 1001 site gets credit for the purchase.

Here is an example. Today, I got Nirvana's MTV Unplugged in New York with the following link:
https://www.roughtrade.com/en-gb/product/nirvana/mtv-unplugged-in-new-york?cjdata=MXxOfDB8WXww&channable=043943696400363838373873&utm_source=CJ&cjevent=986a2a52cf7711ef808d01a60a82b838#vinyl-lp-black

You are prompted to switch to US Dollars and when you do, you lose the link and you get routed to the US store front. In this case, I can manually search for, and find, the album here:
https://www.roughtrade.com/en-us/product/nirvana/unplugged-in-new-york-1

However if I purchase it from search results, I doubt the 1001 site will get credit. Any ideas how to solve this?r