Looking for module: I want to make that quantity of product A depands on quantity of product B

[skiracecenter]

Hi

• I have products in my shop ( type: standard product)
• Products has combinations (sizes)
• Quantities are set in "I want to specify available quantities manually." mode
• I have external program which synchronise my stock level with prestashop

I am looking for module which:

• make that stock level of each combination of one product depands on stock level of combinations of another specifed product:
• Example
• Product A and product B with simmilar Combinations A:(A1,A2,A3) B:(B1,B2,B3). Product A has specifed quantities and we want Product B to have the same stock level:
• Product A and its combinations
  • A1 -  3x
  • A2 - 2x
  • A3 - 1x
• Product B and its combinations:
  • B1 -  3x (depands on quantity of A1)
  • B2 - 2x (depands on quantity of A2)
  • A3 - 1x (depands on quantity of A3)

Do you know such module? I am looking for module which allows me to make such "relationship" to existing products?