You can purchase them according to the specification.
5uF 370VAC for one, and 7.5uF 370VAC for the second.
Your repair man was there to fix something - they are working .. sounds like a suspicious charge to me. It is very unusual for a repair man to break out their capacitor checker and check UF of the Capacitors. The are +- 10% (so 4.5UF to 5.5UF ) is fine. On the 7.5 UF ( 6.75 to 8.25 UF is acceptable ranges) a meter that has a capacitance checker on it is what is needed to determine the capacitance - generally cheapo's do not have this function - although I have a cheapo (not really but cheaper than a fluke) I also have a fluke that measures this.
What reasoning is there that these are out of tolerance ?
This is the more relevant question
Is the unit experiencing any problems - what issues does it have .. ??
Because if they are working - what problem is there that he/she stated they were out of tolerance ?
Did he/she physically measure them and visually show you on his meter the reading?
If you are not experiencing any other problem - I would be suspect of the statement they are out of tolerance, especially if they did not show me the reading.
Typically you can buy these for $5 to $10 a piece - the repair guy will charge you $35 each or more plus labor. Another $150 - $200 . Ka' Ching and many people will be suckered to pay it.