Many thanks Fred, as you so rightly deduced,
I want to use the crystal to convert the 10.100-10.150Mhz
band down to within the 500Khz tunable range of 8.835-8.395Mhz,
It will be used in a bank of other ex-Heathkit crystals in a multiband
converter running into a homebrew receiver.
I will see what some crystal manufacturers have to offer.