On the way back, Lisa called. She has had me tracking down a particular model of portable propane-fired soldering iron: the Portasol P-1, which the manufacturer has discontinued. The parts for the P-1 don't fit the new model P-2, and Lisa says the stores aren't carrying the parts for the P-2 anyway because they haven't been made yet. However, almost anyplace online that said that they stocked the P-1 (which she liked better anyway; it fit her hand better, being smaller than the P-2) no longer has it. I found a couple of places that claim to still have it and have tried to order a couple.
Alas, Lisa is very much someone who, when she finds something she likes, needs to buy a lifetime supply of it, because there's a good chance it's about to be discontinued or the manufacturer is going out of business or something like that. One of the reasons I think we'll need to buy a storage container is to buy the cases of products we'll need to buy of anything she likes. (Think, for instance, of a gross of Danskin Style 1331 tights, which (a) she likes and (b) look good on her.)