Business credit card with low non-sterling fees

We currently have a commercial Barclaycard, and approx 40% of our transactions that take place are in USD. They take approximately 3% in fees each time we purchase something not in GBP, so I wondered if there are any recommdatuons out there for other cards? It doesn't look like a very competitive market to me.

We have other options available to us, we have a USD account, we use companies such as TransferWise and WorldFirst where possible, but find that we still need to use the card on a Tulare basis for cash flow.

 

Amex might be worth a look. I've not seen any others that serve clients without a banka ccount with them though.