Hi John,
Here are two remotely possible connections between Budweis and units using Me 262s:
a) Regarding Erganzungskampfgeschwader (J),
www.ww2.dk/air/kampf/ergkgj.html
"1. Staffel at Budweis?, 2.45-2.45 ..."
b) According to deZeng's Luftwaffe Airfields, in April 1945 Budweis had "elements of 1./Flugzeuguberfuhrungsgruppe Sudost", perhaps to ferry manufactured Me 262s out of Budweis.
best regards,
Jim Geens