Affiliate site, UK & US market

Hi

I found a keyword with masses of traffic and relatively low keyword difficulty for UK and moderate difficulty of US.

The thing is, because of the high search volume. I don't need to dominate the results pages to make money. Any rank in page1 would suffice for me.

Approx 100K traffic per month conbined US & UK.

It's a physcial product and is a one time purchase (so I am happy to just be an affiliate, not even interested in dropshipping).

How do you think I should segment the content for US & UK visitors. There will be different products available to each country. I don't want to give content to UK people promoting a product that is in US only and vice versa.

The keyword difficulty for UK is a lot less than US so I don't want to ignore the UK mkarket. Additionally I am from the UK so I dont really want to ignore the UK traffic.