KLE 500 front hub oil-seal advice

[Ragbert]

Need some advice on the replacement part of the front hub oil-seal. The original is 42x55x7.5.
The shops in my area do not carry ....x7.5. Bit concerned about the 0.5mm gap if the seal is not seated flush.
Can the oil-seal be replaced with a 42x55x7.0?

 

[Smuggy]

 

[Ragbert]