many manufacturers produce trypsin,in both a powder and liquid form,sometimes
as a concentrate that you dilute with di water. I suggest you contact a few
and see your options,I also suggest a pre-made form so you do not have to
weigh it out and spend time worrying if everyone is making the right
concentration. All the antibody manufacturers, usually have  ancillary
products. Try Zymed for instance.
                                            Dana Dittus
                                     histology Supervisor
                                 Abington Memorial Hospital