I'm looking at switching my property bonds to fixed interest bonds.

Banking with FNB, I see that they only do a fixed interest for the initial 5 year period.

Doing more reading it looks like all banks only fix the interest rate for an initial term and not the full repayment term.

Are there any type of financial institution or product where one could get a longer term fixed interest loan with fixed property as security?

Yes, I know the interest rate would be 1% to 2% higher on a fixed vs linked rate.