plasmids pK19 and pBGS19

[KRUEGER, CHARLES M]

Greetings,
	Is there a commercial source for the plasmid pK19?
Is there a Type Culture Collection that has plasmic pK19?
What are the differences between plasmid pK19 and plasmid
pBGS19?  I could not find their DNA sequences in GenBank
or VecBase.
				Thanks,
				Charles M. Krueger
				Texas A&M University
				College Station, Texas USA
				Krueger at ZEUS.tamu.edu
				72714.2240 at Compuserve.com