My next crazy project.

Im sure you guys who follow my posts on here know by now I like to tinker and think outside the box. So today I started a project I have been wanting to do for a couple years now and just keep putting it off. Sorry It got dark on me and I didn't get any pictures so you will just have to visualize what I'm saying until I get some pics. Anyways so what im doing is a gas powered bicycle. I know I can just buy a kit for a hundred bucks but where is the fun in that? Instead im using an old push mower engine off a push mower I got for free. The push mower was free because it "didn't run" I got it running in about 5 mins and actually mowed with it for a couple years until the deck cracked now the blades hit the deck. So im doing a vertical to horizontal shaft conversion. And I know someone will ask why, well why not? Lol it's fun and challenging. The two hurdles are fuel and oil the fuel is easy just make a bracket and turn the carb sideways. The oil is a little trickier. There are alot of youtube videos and stuff showing oil mods by adding splashers and cutting for the crank and cam journals but one thing I noticed when I tore mine apart was there is no way of getting oil to the top of the motor simply by adding a splasher to the crank. Especially on a ohv model like mine. There pushrods and the lifters block off the only holes from the front of the engine (now the top of the engine) so my idea was to run an electric oil pump from the sump to the top of the engine. The trouble im having is I cannot find a small electric oil pump. The only oil pumps I can find are the recovery pumps ment for oil changes and such. And I don't think they would hold up to the heat of the oil with the engine running. Any ideas or sources on some cheap oil pumps?