gold particles for biolistics

[unknown at dl.ac.uk]

I was recently told by someone in Lib Harris's lab that the gold particles 
currently being supplied by BioRad for the particle gun are not working 
well for Chlamy transformation.  Does anyone have a source for gold 
particles that will work well for Chlamy nuclear transformation?

Thanks.

Terri Dunahay
National Renewable Energy Lab
dunahayt at tcplink.nrel.gov