Enabling multiple installations for same major version of TIBCO streaming

Dear Team,

We are dealing in services and have limitations over multiple machines for different clients.

our few clients are working using 10.6.1 in their production and few will use 10.6.2 going ahead.

We could have proposed 10.6.1 only to have single installation in out laptop.

but same is not possible due to below 2 reasons.

we have got few bugs/ functionalities in 10.6.2 which are required for client.

and we are not able to see 10.6.1 in e-delivery.

we need to have both versions to be available on same machine so as to serve all of our clients.

we need to have access to download 10.6.1 in order to have our clients running there projects & fixes.