If you're willing to drill AND have a little time AND have the complete spare as a template, you could try drilling a new "paperclip hole" first, then removing the tumbler normally, then follow a normal procedure to disassemble the housing/steering lock.

Rotating the key creates a channel to insert the paperclip. The tolerances of using a drill would be pretty tight, but possible to create this channel. There's a thread with a link to the locksmith tool that is a jig for doing just this.