convert .asc to .gpg (and eventually vice-versa)

[Jbar]

 Hi, It is maybe a dumb question, but I don't have found an easy way to convert a signed message from .asc to a .gpg ?

 I have to send signed message trough text-only channel, but i would like to store only binary version to save disk space. (I have 
to keep the signature with the message)

 Should I uuencode .gpg message before to send it through the text-only channel, or is there a (easy) way to convert .asc to .gpg 
(and also .gpg to .asc) ?

Thanks a lot folks

Jean-Jacques.
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