I have been thinking about ordering some metric long barrel gold plated spring style female bullet connectors through a local hobby shop.
They are supposed to have 2mm thick silicone boots, come in a pack of 10.
I can't remember the diameter, they are available in .5mm diameter increments, I just took a spare gp with me and we measured with a caliper.
Long lead time, Mark doesn't order from this supplier until he gets a big enough order ($250) to avoid a freight charge, could be a week, could be 2 months, but I'm not paying $40 freight on a $7 order......
I haven't because they are a solder connection, not crimp, but they are supposed to be rated for 150A@32V.....
Marketed to use for hot-rodding the high end RC cars (lipo batteries, brushless motors, etc).
If I do this (and they fit), I'd make a full new GP harness with silicone sheathed wire.
Just throwing this out there for other people who are pondering an alternative to the standard bullet connectors.