In post #1477 you'll find most files for the CB, including a schematic with all component values bythe components:
https://www.vintage-radio.net/forum/...postcount=1477
In this post I've included a PDF-file with just the BOM taken from the schematic in post #1477. Now, I've never built a Sussex myself so I can't say if it is correct or not but it was exported from the Designspark file.
Forum user G8UWM-MildMartin sold the PCBs, maybe he is still selling them, and he should have a BOM too.