don't trust 'another lady'
your bank records with deposits from MSCs and your paypal records are a good start..try to verify the deposits are from MSCs...make a list of company name/addresses/websites as well as specific payment info (if the name is different)
also, try to get some documentation about the MSCs..print a page of a MSCs shops...black out the client name if its listed....have samples showing being paid cash and reimbursed...
even if you don't get a 1099...you can usually print your records off a MSC website....i don't know how many years back you can go...it may vary by company....
I HAVE BEEN THROUGH 2 AUDITS>>>THE IRS AGENTS ARE STUPID>...THEY MAKE UP THEIR OWN RULES...I HAD TO REPEATEDLY SEND COPIES OF THEIR OWN RULES TO THEM.....and yes i did win..