Got smaller rims 16in. For 1994 model

For an MR2, a 205 front with the 225 rear would give the right stagger, assuming you fit the same brand/type tyre F/R. 
What are your rim widths?
If your rim width is over 7.5" you won't be able to fit a 205. (or a 215 for that matter either)   
 

Unfortunately they dont seem to have much of a clue, you'll have to get used to this on all ends of the car related spectrum when it comes to MR2's, this is why so many of us learn on the internet and do our own work. MR2's love stagger.
 
I run 16x7+38 195/40/16 and 205/40/16.  In theory I should have run 215's on the back but I've been real happy with that combo. In hindsight 50's would have given a better ride but oh well.

Jax tyres

Richieyellowmr2
Jax tyres

Jax off?
Which franchise? not fair to tar the whole lot with one brush - they'd be independently owned I bet.

When selecting aftermarket tyres keep in mind that on SW20's Toyota originally fitted 195/60R14 front and 205/60R14 rear
 
On 92+ cars they fitted 195/55R15 front and 225/50R15 rear, and so the story goes the wider rear was fitted because of their so called bad oversteer (in the hands of novices). 
 
Original rims also used a one inch stagger with the rim width F/R
 

The cars game stock with staggered rims for a reason!
 
I have some 16" BBS RS that would be pretty sweet fitting for an SW20.
 
16x7+24 16x8+24 5x114.3
With 215/55/16 and 225/55/16 Pirelli tyres (approx 5mm tread left)
$1150.
 
Let me know if interested.