Kev,
They're out there, but except for a few you don't really see a whole lot of them restored or running, esp. at shows-it costs the same amount of money to do the boiler work on a portable as it does a traction engine, and most folks would rather put money into something they could drive. Darn shame you don't see more out and about, as portables were a big part of steam power out in the woods and farms way back when!
Mike M
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