Good news on the biscuit front. On my last visit to a Walmart, I was very surprised to find they stocked some McVitie's Milk Chocolate Digestives. It's rare to find any sort of British foods at Walmart. There are a couple of local supermarkets that have an extremely small British food section (I should take a photo and share it - just in case you're curious what kind of essential British foods they sell), which normally includes some digestives. But I've never seen them before at Walmart. I don't think they were particularly cheap - especially compared to UK prices - but then again, nothing is cheap nowadays.