On two of mine, the cages are so loose that the rollers actually fall out if you twist them. I can try to stake them, but it might be a whole lot easier to get good replacements.
Didn't Dave Huson advertise a bunch for sale a while back?
If all of the rollers are .496-.500" on both ends and there is no rust or pitting, you will be far ahead to peen the stays back and use what you have. There are many versions of "good bearings" for sale and I have bought my share of them. I find that 50% of good bearings sold would never find their way into any car I own.
If you do end up purchasing sight-unseen, plan on buying more than you need to cull appropriately. Unit price paid should reflect that attrition.
Good luck on your hunt.
I do not believe "peening" the cages to be good advice. Getting them perpendicular to the rollers would be a task in itself without a jig - IMHO !
I've rebuilt dozens of rear axle assemblies including Ruckstells and I won't use a loose cage or a peened cage but that's just me.
It can be done. Since the rollers are completely loose within the cage, the cage would have to be obviously out of square after tightening, to affect the rollers in any way when installed. I wouldn't advise using such a bearing either. To each his own, I suppose.
take a look at tightening bearings on this link: http://www.mtfca.com/discus/messages/118802/129904.html
In that link that Scott sent, Ken Kopsky has a great method to re-stake them. I wouldn't hesitate to at least try that method. Like Scott says, they're "floppy" anyway in a tight cage, so there should be plenty of "forgiveness" with them.
How about spot welding the stakes to the circular end pieces where they pass thru? Kens method would be a good way to hold the bearings snugly in alignment.
Surely a more secure fix than peening