If it is a top-routed body, this is one of the easiest DIY projects. So long as you don't care if it is perfect behind the pickguard, the replacement SSH 'guard is the only template required.
Lay it on there and align the pg mounting screw holes. Mark off the offending wood projecting into the HB opening in the 'guard. Remove guard and begin wood removal. A dremmel with a small router bit will work, but it may take several passes at increasingly lower depths to achieve. Switch to a drum sander before cutting up to the marked outer edges of the cavity. Especially be careful with the cut closest to the Bridge; the gap between the 'guard and the front edge of the bridge plate will expose your craziness if you get too outa control! Most HB's have mounting brackets that protrude to the sides yet even deeper into the body; a hand-held drill is sufficient to dig the sumps required to accommodate the new pickup. Again, don't get too wild here; poking through to the spring cavity can happen if the depth isn't measured and monitored. Mount the HB in the 'guard and test for fit on the newly gutted body. If it fits, great. If not, be conservative and remove modest amounts of wood at the suspected hang-up points until the pickup-equipped 'guard drops into place. It might not be the prettiest hole you've ever seen, but once it's all together, nobody'll be the wiser.
If it is a rear-routed design, and wood-working isn't your thing, ya may want to seek out one of those 7.3 (or 7.6 according to KG's math) router-wizards in a 2K population town near you.