Crystals for older Codan units

I have an old Codan 7727 that I would like to tune to VKS737 and RFDS channels and set up in the shed as a base. I only exepct to use this for getting a better understanding before I lock into a decision on the vehicle side. I already have a sat phone but want HF for the daily skeds etc and to be able to communicate with a few friends out in the desert. Nothin new here eh!

I am looking for atleast two crystals, 2020 for RFDS and 8022 for VKS737 network. If I can obtain others within these networks then I would be happy but it is not imperative. The system will accomodate up to 10 channels.

My question relates to the availability of such crystals and whether they can be purchased readily through the likes of say "Radio Parts" or is it a case of doing the rounds of the HF repairers? Maybe someone else has had a similar experience of late. I am based in Melb and have a friend who can cover off on the installation of the crystals....... subject to me obtaining the parts!

Any enlightenment in this pursuit would be most welcome!!