Hello, we highly recommend replacing your RugMaster 320 and the hose, etc. with the Stealth Kit or other Electric Kit. Others in your shoes have praised the upgrade. Stealth is a better quality vacuum and the hose provides you 27% more suction. The belt has a lifetime guarantee, it basically NEVER breaks. Just the sound of the air rushing into the new hose with excite you! Here is all the kits compared http://builtinvacuum.com/comparison.html
. The RugMaster connection to the hose you have is not standard so replacing the hose and vacuum, in our opinion, is the best decision. A new kit will fit right into your wall ports and work with your system without a hitch. But if you want to replace the RugMaster we have it aviailable here http://builtinvacuum.com/help/beam/accessories.html
. If you have the three prong cord end though from the brush, it is obsolete. Thanks for asking.