Jeff Rowland Synergy's sorbothane feet.

I finally bought a wonderful Jeff Rowland Synergy 1 preamplifier to drive my JRDG Model One, but the eight sorbothane feet included in the box are not the small classical sorbothane disks shown in the Synergy's manual. They are small cylinder (upper four) or half-sphere (lower four) shaped sorbothane feet, and the seller told me that they were sometimes used by JRDG at the time he bought the preamplifier.

I tested other various feet types and I verified that the Synergy's performance is extremely sensitive to them.

May someone suggest me the best feet for the Synergy? May someone please suggest me where I can buy the original feet at a cheeper price respect to the 106 Euros requested me by the JRDG italian importer?

Thank you very much for your help!

Regards.

Luca