Not seen a 'solid' pulley either. The very early crank dampers - on 997 Cooper/early Cooper S and early East West 1100 engines - were a two-piece construction - bigger diameter too - and the rubber insert was between the two pieces. I suppose the inner part that fitted to the crank was solid - and could be used on it's own.
I can get rubber-damper pulleys by the truckload in used but good condition if needed. A+ timing covers, too. Postage is a bit of a bugger but not too difficult to arrange. Last time I looked they were about £25 for all of the bits. Need a gasket for the timing cover or use minor cover and scratch a new timing mark. A+ marks are at the 11 o'clock position so are easier to time.
I sold about 40 sets to the USA some years ago.
I'm not after making a profit, just offering to help. Local scrapyard will sell in bulk.