Thanks for asking.
I make variations is base type, or crimp to nose length, for $10. I can also do a change in diameter for that much on some bullets, and will answer that personally for any customer who emails the question and tells me what is dreams are.
The most common ones I do are gc and pb, and this is a really nice option on 4 cavity molds, where one doesn't intend to shoot many gc, but want's the option occasionally.
In my personal experiance, molds to cast two different caliber bullets turn into a hate thing real quick, because in most cases one of the bullets will be liked and the other of no use.. Ditto with two different weights in one caliber, which is a common desire for revolver shooters. I think most customers with these thoughts will be happies if they simply email me with their desires and let me talk them into one bullet weight which optimizes their needs. This way the sights never have to be changed on the gun, or several guns of a caliber.
My email address is LBTisAccuracy@localnet.com Ask for anything you want. I might do it, and if not, it won't cost you a penny.