swing axle dramas

i have acquired a 62 beetle it has an AO code box rebuilt ,it has wide 5 drums ,it has chronic oil leaks at the wheel seals ,the problem , it has 2 large washers total thickness 9.75 mm between the axle nut and drum to get the nut tight ,so it needs to be fixed,i pulled it apart and the spacer on the inboard side of the bearing is 6.5mm ,is there a wider spacer that can be fitted to make up the difference or have we got the wrong tube and axle combo,i believe there was 2 different spacer sizes ?? i thought the axles were markedly different in length so they couldn't be interchanged like 1&1/4 inch or there abouts, i need about 7 mm ,can anybody give me an idea?????????
thanks

AO code come in 1500 beetles here in Australia...so it i probably a long axle trans.
The spacers are all the same either side of the bearing no matter if the axle is long or short.
There is a 67 only axle in the US/Europe, but I am sure it is just a long axle with short splines,
so it probably has the same spacers too.

Make sure the faces of the spacers are in good shape.
If the axle has been floating around, the may be damaged.

The reason for the large washers will be that the wide five drum is for short axles,
and yours are long axles.
The thickness of the washers needed are normally about 15mm.

The long axle is about 30mm longer to the bearing, and another 15 at the spline.

There are many possibilities of axle seal leaks.

First make sure you have all the O-rings and shims in the correct location.(from the axle seal kit).

Make ure the spacer that the seal runs on, has no rust pits or damage on its surface.
If NFG, get some new ones or have them made at a machine shop.

Make sure that your bearing retainer is the correct one for that axle and tube.
If it does not have the correct step depth in the retainer the axle will float backand forth, and never seal properly.

Because yours is a combination of long axle with short drums,
I would make sure that they have not used the wrong bearing retainer.

thanks Dave,i am off to get another trans to rip the tubes axles bearing caps etc off ,that should cure the problem