>>>Alan - In the Book "Portraits of Conflict" by Roberts and Moneyhon, there are several Arkansas soldiers shown in either Militia garb or in the case of Omer Weaver (Pulaski Battery)- State purchased uniforms - that would have fought at Wilson's Creek. <<<
Weaver's uniform is not a state-purchase uniform... All officer's uniforms were privately tailored and purchased. The only things an officer got from the guv'mint were his commission papers and his salary, paid in the 1860 equivalent of Sure-Pay/check-to-bank.
That being said, the Arkansas State militia companies typically designed and acquired their own uniforms... the first "state-issue" uniforms appear to have been those made under the direction of the Arkansas Military Board at the State Pen in Little Rock. (see http://www.geocities.com/capitalguards/LRfrock.html).
There is another image of one of the soldiers from the Totten Battery floating around, indicating they wore gray jean frock coats with red tape trim on the front facings, gray jean trousers, and kepis.