I don't believe so, I've 15 year experience in Windows desktop support in an enterprise environment and I've never come across anything which would allow for it. A quick google suggested there maybe 3rd party tools that can add it in but I've never tried any. Not sure if its an option for you but if you can use that Win 7 Pro key to upgrade to Win 10 Pro, that includes Bitlocker.
As dynamis_dk said, possibly a third party tool but it's likely to break more than it fixes, plus if you're going third party, you could look at other encryption providers. This would be my vote!
