That sucks that you're out money. Did the UK shop make you pay up front? The US shop only charged when they shipped.
UK usually charges on order, not shipment. However, if you can prove you never received the goods, you should be entitled to a refund - the bankrupcy terms should have some provision for reimbursing anyone out of pocket. If the order was over £100 and you paid via credit card, your credit company may be liable as well.
Check these links:
https://www.which.co.uk/consumer-ri...oney-back-if-a-company-goes-bust-aAmCs2Z30SLb
https://www.moneysavingexpert.com/r...you purchased cost,of the Consumer Credit Act.