Clean the pot you have first, as it is part of the famous original recipe. Cleaning pots is normal maintenance. Use plain electronic cleaner spray, not Caig Gold.
Changing the original pot will change the sound of it, upset the original voicing and lower the resale value, imo.
If it is damaged and cleaning doesn't fix it, try to replace with similar part. If can't find it, go for ALPS pot to maintain similar sound and function.
If you want to mod it for better performance, I would get the goldpoint for best sound quality, but it has limited step resolution. Another option is the ALPS Remote Volume System from bentaudio.com for $130.
From what I saw of the preamp design online there are more valuable opportunities for modding than the VC. But any mod will change the sound of the famous historic component. If you want different sound, better to sell it whole (after repairing the VC) and move on. Just my op-onion