Bryan,
Don't flog yourself to death, if you are not conversant with certain techniques, it is not your fault. You can't be expected to know everything.
If you knew everything you would be walking across the lake rather than sailing on it.
A lot of if's now.
If it could be made out of metal and painted afterwards, and if you have a decent full picture to get the detail, and the correct diameter for it to be, or scale drawings, and if you don't mind waiting a while, as I am snowed under at the moment, I will knock them up for you. F.O.C. On the understanding you pay postal charges and any small material costs.
I can't be fairer than that.
If you want to take me up on it, email or PM me.
John