Re. the nib holders being on backorder at PIA: I have found that they are EXCELLENT at keeping track of their backorders. They offer a discount for the purchase of 100 nibs at a time & I ordered 100 Brause 66EF nibs, which were on backorder. They called me to tell me that they were going to ship them when they got them in. I expressed my concern that they'd forget about me and I was reassured that they would NOT forget me. Sure enough, a month or so later, I got a notice that the nibs were in stock, so I paid for them & they shipped them right away.
Re. the hourglass nib holder, I have have one and really love it. It is very light and I like using it. I got a Christopher Yoke nib holder from my children for Mother's Day this year and I just treasure it! It's a work of art! I think the guy who makes the hourglass nib holder at PIA is the same guy who makes the brass inkwells with the screw tops and also makes custom ink for PIA. He works in a machine shop somewhere on the US eastern seaboard. I'd sure like to meet that guy! WHO makes ink??!!