Got the quote from Labglass in Brisbane for custom cooling mouthpieces.
Custom dimpled L hook, like in my pics- 14mm male joint, 13mm tube, 2.2mm wall, 125mm long, 9 dimples. AU$53 ea (about US$41)
Custom dimpled J hook- 17mm tube, 2.2mm wall, 250mm long, 12 dimples, tapered mouthpiece end. 14mm...