From the organization’s website:
The IAGSDC supports gay and lesbian Modern Western Square Dance (MWSD) clubs worldwide, including the United States, Canada and Japan. Our organization was formed by and for lesbians and gay men and for their friends. You do not have to identify as gay or lesbian to dance with an IAGSDC club. Membership is open to all square dancers. All IAGSDC clubs dance the Callerlab specified levels of MWSD.
Square Your Dance 
Is there a number I can call? I found a pin where I work and wondered if youd be interested in it (Portland 87) is on it
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I asked around and didn’t get any takers, unfortunately. Seems like it would be a nice memento for someone. The next convention is in Seattle, by the way.
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You could try contacting the organization directly.
https://iagsdc.org/
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