Most cryo vendors have a per pound charge. Here is an example:
http://www.cryopro.com/bulk.htm
If you are fortunate enough to find a vendor locally, you may be able negotiate a slightly better price if they have an almost full load going in and you are the "top up". It is not very expensive.
http://www.cryopro.com/bulk.htm
If you are fortunate enough to find a vendor locally, you may be able negotiate a slightly better price if they have an almost full load going in and you are the "top up". It is not very expensive.