Custom Neodymium Block Magnets in Grade N50M

Looking for N50M or N52M Custom Permanent Magnets:
For our application I am looking for a supplier of neodymium block magnets. To be more specific:
Neodymium Block Magnet 
 
Axial magnetized
Nickel Coated
Magnetization Grade 50M and 52M (if possible)

First of all would be interested in receiving a quote and lead time for order sizes of 100, 4000, 40000 and 400000 pieces. The order size of 100 is intended for evaluation and prototyping purposes, the sets 4K, 40K and 400K is the projected order size in the time span prototyping + 2years. 
Second I would like to know the expected tolerances of this design.

If anything is unclear or additional information is required feel free to contact me.

Neodymium Permanent Magnets Manufacturer  China Rare Earth Magnet Limited:
Thank you so much for your inquiry.
We are specialized in producing neodymium iron boron NdFeB magnets.
Quotation is in process.
We will get back to you soon.

N50M Custom Magnets Manufacturer China Rare Earth Magnet Limited:
Please find the quotation below:
Permanent Magnetic Material: N50M NdFeB
Block Shape, Size as per your requirement
Coating: NiNiCu
Magnetization: Magnetized
Magnetization Direction: Through Thickness
Unit Price: USD***/pc