How to inject unevaluated list of Unique into a RuleDelayed?

This can be a good case for a Block trick:

Block[{Unique},
  With[{x = Table[Unique[], {i, 1, 3}]}, rules = {patt :> x}]
]

(* {patt :> {Unique[], Unique[], Unique[]}} *)

$userInt = 5;

With[{
  x = Table[Inactive@Unique[], {i, $userInt}]
  }, 
   rules = {_Integer :> x} // Activate
]

{_Integer :> {Unique[], Unique[], Unique[], Unique[], Unique[]}}

{1} /. rules

{{$27, $28, $29, $30, $31}}

So many ways:

Apply[Unique, (patt :> #) & @ Table[{}, {3}], {2}]

(patt :> Evaluate@Table[foo[], {3}]) /. foo -> Unique

Hold[Unique[]][[Range[3]^0]] /. _[x__] :> (patt :> {x})

(patt :> {##}) & @@ Table[Unevaluated @ Unevaluated @ Unique[], {3}]

(Function @@ {patt :> Evaluate@Table[#[], {3}]}) @ Unique

All produce:

patt :> {Unique[], Unique[], Unique[]}

But I must say I don't see why you wouldn't just use:

rule = patt :> Table[Unique[], {3}];

patt /. rule
patt /. rule

{$3, $4, $5}

{$6, $7, $8}