Joined: Jan 2010
Posts: 9,781
Likes: 1,749
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
If a greater gear-count is what the OP is after, there are now (I believe thanks to the E-bike industry) a large selection of different speed freewheels (up to 11s) readily available at low cost.
These seem to all feature HG-style cogs, and are extra-strong for mtb use with today's small chainrings.
I was able to narrow an 11-36t, 10s freewheel to a 13-36t, 9s freewheel for use on a 6s/7s hub using as small as 124mm axle spacing.