i had the same problem as u mate. i really wanted an ek4 but so hard to find 1 for decent price and low kms and i was really fussy bout the sunroof i personally thinks mad.. haha
i ended up findin a gli with a b18 in it for less then what most ek4s are going for. i reckon you should take ur time look around for an ek4 because the interior is nicer, you also have sunroof and vtec. instead of saving up for an engine just save up for a facelift and build that car (Y)