I've been away on a trip to Japan, so a little late answering. Sorry.
The 54302/54302/54010 etc etc prefixes on the stock & option strut components simply identify the part according to the Nissan parts numbering system, where 54 denotes front suspension section, 000 up denotes front springs, 200 up spring mounting parts, 300 up suspension crossmembers & 400 up suspension assembly parts. The Competition Department in Japan used these as suffixes in their unique (Works) part numbers, so I guess it makes sense that they correspond somewhat.
I'm not sure that the E7220 Rally Option struts and springs are going to be much use as reference for you. I own a set and they have looooong tubes and looooong springs, putting the car up at 'Safari' type ride heights for max travel and ground clearance. They are oil-filled and also gas-charged, but I'd say they are a step below the Works type parts in sophistication and build quality. They were probably OK for a 'Clubman' type rally car in period, but my friend Kevin Bristow used them on his car 'OMT' (prepped in period by Old Woking Service Station) and found they they soon overheated on rough stages.
Some photos of my set for reference: