That's sorta what I'm using. When I bought my last Mesa Walkabout 12" combo (2nd hand but from a dealer) it stated that it came WITH the Stock MESA cover. Since I'd owned an exact same Walkabout combo before, I knew what these covers were like. ..all good. But. .....
When it arrived, the "stock" Mesa cover was in fact a stock Mesa cover- but for a different Mesa amp. ..most likely a 212 combo or similar.
Anyway. ...to cut a long story. .. I've sold the Walkabout, but the cover I kept as it's got a nice pocket in one end (big enough for power and speaker leads) & it's pretty much the exact length for the V4B RI.
It IS too high/deep. .whatever. .. so I fold the ends up (I s'pose I should cut em off & sew em up nicely) & it does the job fine for the Ampeg. Good thick material. - no padding, but I'm the one loading and packing it anyway, so I'm careful. And the top handle hole is pretty much perfect.
It ain't THAT heavy anyway, that I feel I NEED a padded cover - I don't feel like I'm gonna bang it on doorways etc. .. & haven't yet.
The amp is still in pristine condition, so it and I'm, doing an ok job of keeping it well. ..err..kept.
Of course it doesn't LOOK as fancy as a custom, padded cover, but I don care! It works and I've saved $100 by the time I add postage etc. ..
But if someone close to me feels the NEED to get me a custom designed, padded jobbie.... who am I to argue. And it would make a nice birthday present.
@mypreciousandmostgraciousdarlin


