I have prepared list of flag sponsors from Simtek s951 from San Marinese gp 1995 -Excluding Scorribanda Edizioni Musicali replaced Ventaglio's Vacanze nel Mondo displayed exclusively in Brazilian and Argentinian Gps :
ITP srl italian Distributor of Japan's NOK COrporation-www.itpsrl.com
Cellular Line - most identifitable
JAS International
Vamp Tech (appeared early in Jordan 194 Portuguese Gp 94)
Luca Giordani - clotheswear (indetificate this font)
Braglia Verniciatura
DMS Cosmetic (after Simtek's folding appeared in Jordan-Peugeot during Italian gp)
Fotolito Felsinea (see www.fotolitofelsinea.it/ and identificate this font)
Conserva Medusa a Regnoli brand