Internet Merchant Account for Cayman Islands

Hi - I am looking for a provider of an internet merchant account for a client based in the Cayman Islands - www.tarawalkersdream.com.

Tara is investing in new products and an upgraded site and wants to move away from PayPal.

My experience to date has been;

1. Her own Cayman bank won't provide an IMA because she has no physical store front.

2. Worldpay won't provide their service because they don't do the Cayman Islands.

I would be really grateful if someone with experience of similar issues could advise where we might be successful before I begin to trawl through the long list of options myself.

I was thinking Google Checkout might be an answer, but can't see any info about the geography they cover.

Thanks

Iain Forrest