Don't know if you have solved your bolt issue yet. I lost the bolt off of my F75 the second time out. I found a suitable replacement by going through the nylon bolt and nut assortment at Lowe's Hardware. I went with a nylon wing nut for the end. Only cost a couple dollars, and so bought a spare set. Works fine, and I haven't lost it again.
On my use to have MXT it used a 1/4-20 thread nylon dome head screw with a domed nylon nut. Lowes or Home Depot or a normal hardware store would have something to suffice.