250-500cc Shock bushing

hello, On my ride last weekend I started getting a squeak in the rear end of my bike. Time to pull apart and grease everything up. Maybe replace everything in prep for the season. But I noticed that my rear shock had some rotational play. What I mean is that with everything bolted up and in place, if I grabbed the gas reservoir on the shock I could rotate it a bit forward and backward. Is this normal? My friends bike, ktm 450, didn't budge, and I don't recall my YZ doing this either. If not normal, can someone give me a heads up on where to get upper and lower bushing for the rear shock?
Thank you!

I'm on my 3rd lower shock bearing since 2010, in fact I keep a spare in my tool box. Even though I grease all the linkage and the shock bearings every 6 months the lower bearing is still prone to failure... probably because it rotates very little so it usually wears through the hard chrome that the needles ride on. (being down in the water and muck doesn't help much). When I start seeing up and down movement in the lower shock I replace it before it has a chance to wear on the shock.

A little bit of movement will be normal as they are spherical bearings top and bottom, they are supplied with rubber seals and a top hat bush to get spacing right. The way to check how severe things are going is to strip down and visually check. You can have bike on a stand and lift rear wheel that will indicate if there is slop anywhere.

My 2008 WR250 had a fairly loose fit at the top bearing which I was told was normal. I replaced the bottom with an All Balls spherical which was a really good upgrade for these bikes.

Great beta guys. Thanks! Another question. How much up/down play is normal for the swing arm? I know even a new bike has a little play, but just curious what you all use as an indicator of when things are played out.

Mines got no slop before take up of suspension. I would say any where between zero and a very very small amount.