Where to find a neck holder for a large tremolo harp?

Hi folks. I'm new here, and new to the instrument. I've got a ridiculously large family heirloom harp, 30 holes, about 8.2 inches/210mm long, that's recently been cleaned and tuned back to playing condition. Beautiful, warm sound. I'd like to get a neck holder for it, but I can't find any made for something this long. Does it exist? Can it be had for a reasonable sum? Advice appreciated.