Windage tray is steel, attaches between the oil pan and block (sandwiched between two oil pan gaskets). Keeps oil in pan on left hand corners. As for crankscraper role not as tight a fit to the crank as the Ishihara-Johnson teflon versions. Tolerances are loose so may need to do a bit of griniding to fit your engine. $50 new, asking $25 obo.

http://www.iemotorsport.com/bmw/item/m20optray.html

Ireland Engineering aluminum oil pan baffle bolts on top of the shelf in the stock e30 oil pan, or can be welded in. Again addressed oil pickup issues in left hand sweepers. Had to do a little grinding to get it to fit and it is slightly bent from the bolt-in install.  $48 new,  asking $15 obo.  http://www.iemotorsport.com/bmw/item/m20opd.html 

Trying a different approach with the new engine so no longer need these.