FWIW, there are two eBay sellers offering these double-ended turning-facing (threading?) toolholders presently.
HHip and tools4cheap are offering these holders with inserts for $44/45 plus shipping. I would expect that these tools are China imports, so expect that the dovetail dimensions may differ on these generic/cloned parts.
The holder type-number for this particular style of holders is type 16 or
16* with a suffix letter, as a RCM participant with a genuine Aloris holder had informed me of, when I had asked about the toolholder in a posting quite some time ago.A number of years ago, hhip was the only seller that I could find that was listing these holders, then afer a while, there wasn't anyone that I could find offering them for sale.
In case there might be anyone that's buying tooling these days that doesn't already know, the fit/quality of "interchangeable" parts from China (or India) is often fairly poor.
WB ......... metalworking projects