'Back in the day' electrolytic capacitors typically had very coarse tolerances for their value. e.g +100%, -50% wasn't exceptional. Therefore if you cant easily buy an exact match to the value, substitute the next higher preferred value in a 20% tolerance capacitor range, and it will almost certainly be within the original specifications. Similarly if the exact voltage rating isn't available, go for the next higher one. Therefore to replace the O.P.s capacitor, one is looking for one 33uF >150V cap, two 22uf >150V caps and one 22uF 25V or 35V cap.
If you are going to re-stuff the can, its preferable to get 105 deg C rated ones, in case the ripple current causes them to run warmer than you expect, as they wont have any airflow in the can.