Coupler/Adapter for Metabo Vac and Metabo Sander set up?

[Vinko]

I'm trying to connect my Metabo ASR35 Vac with a smaller Metabo orbital sander. I'm thinking I need an adapter because I can't get a good seal on it (not the same problem with the larger Metabo sander). The ID at the vac is about 28mm and at the vac about 26mm (though the hose connector will stretch a bit. Just can't get a good seal. Is there another part I should no about? Maybe an adapter or coupler? I think Bosch also rebrands this particular vac.

Connection (sander exhaust on left, ASR35 hose on right):

Sander (SX E 400)

Vac (ASR 35) hose connector:

 

[Monte]

This adapter might help:
http://electrical-components.com/starmix/425719.html

 

[Vinko]

Great, thanks Monte! I was trying to recall what the OEM for the Metabo vac was called anyway, so this might do the trick.