Walk Behind Lawn Mowers

I have a walk behind mower model 5521chvb serial 021104m009491 I have tried to order the bagger and frame for it from two different companies both times I was told the original part numbers were obsolete and the new part numbers were 532410667 and 532194643 the frame seems to be to small for the bag and is to narrow for the mower as I said two different places sent me the same wrong fitting parts Is Husqvarna send the wrong part to these people partstree.com and eparts.co I love my mower and want to bag my grass any help would be appreciated

Don