Sony KP-53HS10

Need to replace bulbs.

Don't know how to access bulbs.

Don't know bulb part numbers.

Don't know where to purchase bulbs.

The only description I have is from the owner's manual:
- 7-inch high-brightness monochrome tubes (6.3 raster size) with optical coupling and liquid cooling system.

As far as I know, I need 3 of these little gems.

TV purchased in March 2000.

Anyone out there can help out?

Thanks for all of the replies, I've located and priced the bulbs ($390 total).

The picture still looks great, but.....I have DirecTV and am considering upgrading to HD; wondering if I should switch the bulbs anyway for the best HD picture.

Also, I assume component video would be the best connection (no HDMI)?