Thank you so much for your reply!
I got some Dr Scholl's orthodics this weekend, and some toe-stuffers. Combined with my thick wool socks for my drysuit, they have made the boots comfortable and secure to walk in. They are a tiny bit clunky still as they are too long for my foot, but I feel confident enough to walk in them for some time now, until I can afford to get a custom pair from CrowProps.
Thank you so much, again!