Enclose Disc Numbers in Brackets

What I am trying to do is enclose disc numbers in brackets

For example
Disc 1 would become (Disc 1)
Disc 2 would become (Disc 2)
Disc 12 would become (Disc 12)
Disc 20 would become (Disc 20)

I can get Disc 1 to (Disc 1) and Disc 2 to (Disc 2) but when it comes to double digits the whole thing falls in a heap so I need your help please. I work in community radio and this feature is very important for cataloguing purposes


Use replace with regular expression action.




(Disc $1)

Reason for edit:
Used negative lookaheads method

Many Many Thanks