Both segments at the same time(period). Where? (no USA)

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Hello folks, I was planning to have both segments lengthened at the same time\period. I do wish to gain 7/8cm in total (eg 4+3) while maintaining the 0.8 ratio between tibia and femur.
I'll be quite happy to have a panoramic view of the centres that offer this option apart from USA... So please help me!

Thank you in advance guys(and gals)

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mmm this makes no sense, you can use normal lengthening time and every bone will heal by itself with its time.  There seems not to be a compounded effect on bone healing, inflammation in the worst-case slows down bone healing.  I have read about Paley mm/day and they are slightly smaller than average not 2 times bigger...