[plt-scheme] Olin's SRE notation for PLT?

Has anyone either ported the scsh regular expression stuff (including the SRE 
notation) to PLT, or implemented the SRE notation (alone) on top of the 
pregexp library?

I am considering doing the second, but don't want to "roll my own" version if 
one exists already. What I have in mind is a macro to translate the SRE 
notation into the s-pregexps of Dorai S.'s library.

(A secondary request- if anyone is particularly interested in having such a 
thing, please send me a note off list.)

Jim
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