I suggest you visit a second-hand store. Those training labs sometimes come up.
One thing I strongly recommend is sitting down and doing real experiments and learning how to build things. I like the looks of the experiments at and would suggest you work through some of those. You'll learn a lot.
The kits were good things to build and learn things from too. When I was a college student in the 60's, one of my lab courses required us to build a couple of Heathkit kits (a VOM and VTVM) and they were good practical experience. The teachers loved them because all the instructions were in the book -- meaning the teachers rarely got bothered with the details, as you were expected to figure out things yourself. Alas, as KeepItSimpleStupid said, these companies selling kits have all gone kaput.
I think it will be easier than you think to find a mentor to help you -- you just haven't gotten creative enough about it yet. Advertise on Craigslist and put up some cards on the bulletin boards at the local shopping centers. Also stick an ad in the newspaper. Do something nice for the folks at the local Radio Shack and then give them a card with your name on it and tell them you're looking for a mentor and to have them ping good candidates who come in. Talk to your local librarians, science teachers, college teachers, etc. Call a local company that's likely to have electrical engineers and ask them if you could e.g. post a note about needing a mentor in their company rag. When you get a contact, make sure you write name and phone number down, then use them to make other contacts. You need to learn how to network. I'll bet you'll find some retired guys who wouldn't mind helping you.