Replace the barrel bushings on a Crosman NP?

First, Happy New Year to all y'all! I pray that 2018 is a prosperous and joy-filled year for each and every AGN member.

Second, I am looking to replace the plastic barrel bushings in one of my Crosman NP rifles and need the wisdom of the AGN Collective. I've read of some using commercial washers with judicious grinding down to fit, but I am leery of this fix given my lack of home machining skill. I know that at one time Gene offered brass bushings sized for the Crosman guns but he's passed on and I find nothing online about sourcing those bushings now.

Anyone have a lead on who I can contact, or what site I can access, in hopes of getting superior bushings for a Crosman NP?