DealMux Sliding T Slot Nuts, M8 Half Round Roll in T-Nut for 4040

If you don't need the slots, 8020 sells matching square tubing, I would guess you could bend that for the profile and use two extrusions for the

Aluminum 6063 Surface treatment Anodized Color Silver Length Unit price 1mm 1m Shape Round,Square,T-slot,or as per the drawings and samples Fabricat

round t slot extrusion This aluminum extrusion item is frequently used as a tubular cross tie in a FIFO storage rack to hold XLean roller conveyors for material presentation

round slot  x Quarter Round Tslot Extrusion Inch w 32ntslot, stick length 240 in