GEARBOX PART 2: Finding the right bearing or Finding the right casing????

GEARBOX PART 2: Finding the right bearing or Finding the right casing????

my gearbox is Getrag 240 from E28 520i year 1983... and they changed the bearing and front casing input bearing hole from 62mm to 63mm after 1984...

turns out getrag 240 input bearing available on stock by most supplier are 1984 onward with measurements: 63x30x24.8mm and part number: 23121224375 (bottom one on the picture)
 
what i need is the first gen, measurements: 62X30X23.8mm. parts number: 23121224069; from 520i E28 1981-early '84 (top on on the picture)

eventhough the inner diameter is the same between both bearing, it will not fit on my older casing


the rare bearing that i need are interchangeable with:
- E28 518 Sedan, M10, Europe, RHD, MANUAL (1981-84) : GETRAG 240 GEAR WHEEL SET,SINGLE PARTS
- E28 520i Sedan, M20, Europe, RHD, MANUAL (4072) : GETRAG 240 GEAR WHEEL SET,SINGLE PARTS
- E21 320i Sedan 1982, M10, MANUAL (1982) : GETRAG 240 GEAR WHEEL SET,SINGLE PARTS
- E30 318i Coupe, M10, MANUAL (1982-84) : GETRAG 240 GEAR WHEEL SET,SINGLE PARTS

so i also tried requesting for those particular alternatives....

HOWEVER... i still couldn't find it anywhere and ordering from BMW dealer will take 1 months at least....

so i look around and found a GETRAG 240 year 1985! from mr Irs (ianparts.com)... it has broken synchromesh but it mean i can salvage the front casing which has the current bearing available from most supplier! (63x30x24.8mm and part number: 23121224375) which also mean no need to wait for the rare bearing of the pre 1984 anymore (62X30X23.8mm. parts number: 23121224069)

2 box in my boot end my day... will continue on tomorrow...