MAF for a 99> is around £70 as it's inserts into the MAF housing rather then a seal unit in the MAF tube as per Pre99. These were around £250-£300.
I thought you had sorted your problemwhen you found the split hose ?
if it's still the 'bank lean' code then I would suspect either a boost/vacum hose problem or the front o2 sensor.
Dukeboy may have a spare o2 sensor, as he changed his and it ended up being OK. The fuel pressure reg vacum hose was the problem.
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