Questions still unanswered about GOP donations

When the Arizona Republican Party made their post financial disclosure last week it showed they had raised $116,400 between the dates of 8/14/2008 and 9/22/2008. Of the $116K, $105,000 was made over two donations from something called "SCA."  Since the report came out last week we have been asked via email and IM "what is SCA?"

We don't know, and to date the party has yet to been willing to answer the question. So we ask again. What is SCA?  

One donation form SCA was made in the amount of $80K on 8/21 and another for the amont of $25K on 9/10.  

Name: SCA
Address: PO Box 32045, Mesa, AZ 85275
Occupation: T/B/D, T/B/D
Memo: Unincorporated Association of individuals