Usually crank and cam seals are done with a timing belt replacement. With the water pump you should also do a new thermostat and gasket since it is right up against it. Here are some discounted parts prices for you.
Water Pump - $86.62
Water Pump Gasket - $2.04
Thermostat - $9.80
Thermo Gasket - $2.66
Cam Seals - $6.42/ea
Crank Seal - $5.74
If you let me know what pulley you need I could give you the price for that also.
Perhaps if you told the dealership you are getting the work at that you can get the hook-up on parts they may try to cut a deal with you. You can always buy the parts yourself and bring them in.
Jackie
Wilkins Subaru
410-689-8061
subparts@wilkinsautomotive.com