Long Version: When I got my 1928 Ariel in 2017 it had 'QL' stamped on the gearbox.
I didn't consider trying to sell the gears at that time because they might have proven necessary if my gearbox failed on the Cannonball, which it didn't. Then, not long after the Cannonball was over, an Irish friend with a 1928 Ariel asked if I would sell the gears to him, which I was happy to do. So, I shipped the box to Cork. Unfortunately, Burman changed the gearbox slightly during 1928, and his gearbox needed the type of cluster with a speedometer gear as part of it, which my cluster does not have. The box then moved to another friend's house in Dublin where it lived during the covid years. But, after attending this year's Irish Rally, I brought it back to the U.S. where it will sit forlornly in my garage if no one wants the gears.
Postage, with insurance, when I bought it was £40, but no doubt is more now. However, without spending too much time looking into it, the £/$ exchange rate is 2% lower today than the average for 2017, and inflation since then has been 25% so, presumably, if the same gears were manufactured today they would sell for approximately £500 plus shipping. Life doesn't always give second chances, and rarely third ones, so if you want a set of new 'QH' gears at 2017 prices, send me a Private Message. I'll leave it to the potential buyer (if any...) to research the cost of shipping it to them using whatever service they prefer.