Buy cassette tapes. According to m u s i c i a n / p r o d u c e r s, these are the best spots.
Keeping in mind you’re looking for DIY prices, the cheapest places are:
How much should you pay? It shouldn’t be up there around $1,000, which is what some companies are charging. The ones listed above charge much less.
For example, Duplication.ca reportedly can do around 150 cassettes with inserts and cases for not much over $500 USD.