Rental bore scope that looks sideways?

Do any of you know of an auto parts store which rents/loans the kind of bore scope that looks sideways instead of or in addition to just along the axis of the cable? The one at Autozone supposedly has the little mirror that can be clipped to the cable, but I tried one of those once and it was tough to make out anything. Horrible optics.

This isn't for the Prius luckily. The wife's 98 Accord has "mystery coolant loss" which might be a slightly leaking head gasket. (How mysterious? Coolant disappears, no white smoke, no smell, no visible leaks, cooling system held pressure for 20 minutes with at most 0.1 PSI loss, not a drop under the car, no leak in the cabin, no oil in coolant, no coolant in oil, no overheating, no bubbles in coolant while running, otherwise car runs fine. Have not yet done compression tests, but doubt it will show anything.) We looked in the cylinders with the bore scope I already own, which just shows a cone parallel to the cable axis, so we couldn't get a good look at the cylinder walls, only the top of the piston. The plugs and cylinder tops all looked pretty similar, none had that "steam cleaned" look