I guess they don't make parts for Model T's anymore.
Same happened to me and my 1997 Toyota Corolla in 2016 - an electrical part in the steering wheel broke so the steering wheel airbag would not deploy if there were an accident. The part was no longer made so I ended up getting a new Corolla because my old one really wasn't fixable and obviously dangerous to be driving.
As for the lawn mower, I'd be happy to look at it for you if you invent teleportation.
When my rarely used lawn mower (mows weeds in my natural backyard when they get bad) doesn't work, I find I can fix it myself as I'm semi-handy with things.