PSE at one time made a conversion kit to convert a std FE topoiler block to a sideoiler. Basically three tubes fed oil through hollowed crossbolts to supply oil to the mains. Of cource the block needed to be machined for crossbolt caps plus the kit. I see them on ebay from time to time but they go for big bucks. I'm not sure how well they worked but it was an interesting concept none the less.

G.