Visionary is very hard to come by for me as well, considering I really enjoy throwing their products. I live in Eastern USA and I haven't come across any proshops selling them, but know the operators could order them.
As far as the other three are concerned, the main pro shop I frequent sells D/T, R/G, on a regular basis.
In regards to Visionary since the company is smaller than your average one, not too many bowlers know about them, so I'd believe the operators wouldn't want to take much of a chance on something that's not "mainstream".
Also they induvidually inspect their equipment by hand so it takes a little longer for them to reach the market.
As far as drilling, their web site has a pretty generic layout sheet you can go by, or you can UTILIZE the UNMARKED MB in the balls to achieve "advanced" layouts for more enhanced reactions.
I have gotten all of my VBP off this site from fellow users, but I'm sure you could also call the factory directly, they have GREAT customer service.
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Would you give everything up, just to do it all over again?
Pin_Krusher IS a serious threat to modern day bowling wood as we know it today.