You may want to seek out the creators of this
and see if they applied the same technology used in showing Red October diving into Mariana's Trench, only from the trench's POV.
You could also just try making your own as a few have suggested. Maybe tape a camera / camera phone to the side of one of those fleshlight thingys - your camera lens becoming the "eyes" of your oral provider.
Scene starts focused on your navel (or ball sac, depending on position of sucker and suckee), and then zoom in, zoom out, zoom in, zoom out. Repeat often, and vary the speed and depth of zoom for realistic look. And try not to spooge to quickly into the fleshlight. You're aiming for something longer than two or three minutes (unless the size of your memory card dictates otherwise).
For the audio track make you own sucking slurpey sounds (your face is off-camera) with props, keeping time with camera work. If you're not comfortable making the sounds yourself, you could always just stir a fresh pot of Kraft Mac & Cheese with a wooden spoon. I think you'll find the audio of this very similar to the real thing.
Mix it up too. Use the tonsil cam. Move the camera in closer and closer to the head of your erect peni and just before you press it against the lens, turn the lights out. Just for a second or two. And then turn them back on as you draw the camera away. Peni goes in (dark), some slurpey-slurp, peni comes out (light again). It's light, it's dark, it's light, it's dark. You get the idea. You can add one of those fancy "wipe transitions" in editing to make it look like a mouth opening and closing. Be sure to vary the stirring of noodles and your breathing so this all sounds very realistic.
If this is picked up by some distributor, or you create the next big internet porn "hawt thing", a small executive producer credit would be appreciated.
Seriously though, other than the suggestions about instructional videos made above, your best bet may be orally themed gay porn. Straight porn, for the most part, does not focus on the peni, but instead on the girl. If you are wanting to watch an erect peni looming and filling your screen, say from the point of view of the oral negotiator, you may want to check out some dude-on-dude BJ flicks, where there are no women to take the spotlight, and the camera may share the focus between the hard peni and the fella making it disappear in his mouth. This shouldn't be too big a deal for you as it seems you are interested in the peni more than the girl. Unless of course, you are just curious about how a dude's belly button is viewed by a girl, up close, like when she has his peni in her mouth.