the 4 spoke came on rs16i's as std, there are also other types of 4 spoke rs wheels which were fitted to mk1 & mk2 escorts these have slightly different dish of the spokes and the wheel rim is a bit thinner and obviously different bosses, the 3 spoke ones were an optional extra for the s1's and s2's according to my 80's ford optional extras catalouge

brand new rs16i ones can be found and usually go for around £150-£200 in the box

quickie on here and the rsoc bb used to be able to get them for this price from germany if my memory serves me correct