One idea would be to approach Doug who is on here as cutting solutions and sells all sorts of knives and saw blades. He may well know of a conversion method.
I should say though that most conversion kits are to go the other way eg from re-sharpenable to disposable.
Have you considered making a holder so that you can sharpen the disposable ones? I don't know how practical this would be.
You will need another couple of posts here before you can use Private Messaging (PMs)
hth
Bob