A similar tyre is Avon's CR6ZZ. Still expensive I'm afraid, it's the only way you'll get that "racer" tyre look, but don't forget that the wear rate for these sticky race boots is way higher than any standard road tyre.
Hi, for a 14" tyre, to fit Alfa rim sizes between 4.5 and 7" wide, they are 185 x 70 x 14, . Still very expensive, upwards of £150 per tyre I'll bet, dependent on where you go for them.
They do have the same look as the Dunlops when fitted to a 7" rim.
I've seen lots of Alfa racers on them at Historic events in the UK. Avon CR6ZZ | Longstone Tyres
Interesting, I looked at the Longstone Tyres site and see the Avon CR6ZZ 185/70/14 is actually 201mm in cross section and 625mm in Dia. So it is closer to a 195/70/14 than a 185/70/14 in Dia., actually closest to a 205/60/15 in dia. at 627mm and closer to a 205 than a 195 in section width. The tire is actually a 201/67/14.