The Envelope Supplier is located in La Porte, United States on 1372 Lakeside St. The Envelope Supplier is rated 4 out of 5 in the category envelope supplier in United States. The Envelope Supplier: your wholesale envelope distributor for envelopes of all sizes and colors. We offer custom envelopes, custom printing and large bulk orders. Contact us for quotes 219-730-1571. LaPorte, Indiana