QinQ switch or similar

[Bonald <bonald () gmail com>]

Hi,
We need to purchase some switch that support 1gbit QinQ.
Any suggestions ? We need to connect 9 schools together in layer2.
All 9 schools have 1gb link from our provider, provider gaves us 5 vlan to
work with.
We have around 35 vlan in-house.

We are low budget. Any recommendation beside QinQ ?