Your parents aren't obligated to provide a Form 1098 and although the interview and tax forms assume a Form 1098 is available, that's not always the case. Presumably you can figure out the interest paid based on the amount of the loan terms and the stated rate. The parents will report interest income "as if" they had received a Form 1099-INT and you'll report your interest deduction "as if" you'd received a Form 1098. There's no problem with that.
Tom Young
