com:create-guid fails on LWW5.0 - any workaround?

Hi,

On LWW5.0 the following (or using the editor "Insert GUID" command which
calls it) fails (it works on 4.4.6):

(require "com")
(com:co-create-guid)

Error: Foreign function COM::%CO-CREATE-GUID trying to call to
unresolved external function "CoCreateGuid".
  1 (abort) Return to level 0.
  2 Return to top loop level 0.

Type :b for backtrace, :c <option number> to proceed,  or :? for other
options

Any suggestions for a convenient workaround?

- Dominic