What is the scriptural basis of the Tabernacle with the Blessed Sacrament as in the Catholic churches? This question extends from this one.

Is there scriptural basis of the Tabernacle WITH the Blessed Sacrament as in the Catholic churches?
As far as I can tell, there is no scriptural basis for a Tabernacle with the Blessed Sacrament. 

The Tabernacle found in Catholic churches follows from the Ark of the Covenant. The Ark was said to hold Manna (See Exodus 16:32). (The new Testament corollary being the Eucharist.) You can see the similarities in design (e.g. the two angels facing each other) from the pictures on the page you linked.

If you would like more information about Tabernacles in the Catholic Tradition you can visit the Catholic Encyclopedia

For more information about the Ark of the Covenant.